I would recommend you to test the drive with another USB cable and on another PC. Check if the drive is visible in Disk Management and in Device Manager, under USB devices. If it is recognized in Disk Management, check if it has drive letter and file format. If possible, upload a screenshot.
If the drive is not recognized, even on another PC and with another cable, you may need to use some data recovery tools. Check the downloads section of the forum.
Hope this helps